Reds' Votto undergoes more tests for dizziness

CINCINNATI -- The Reds still don't know what's wrong with first baseman Joey Votto, who has been suffering from dizziness.

Votto had more tests Tuesday in Cincinnati, and more were scheduled for the next few days to try to determine what is causing the dizziness. He was out of the lineup for the start of a series against the Phillies on Tuesday.

Votto is the Reds' top hitter at .366. He came down with the flu on May 7, returned to the lineup last week and began having dizzy spells. He had to leave a couple of games in San Diego over the weekend because of the problem.